Breast-drill support.



T. BERGMAN.

BREAST DRILL SUPPORT.

APPLICATION HLE'D APR. 2. 1915.

L1@%,3Q?. I Patented Dec. 14, 1915.

2 SHEETS-SHEET I.

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T. BERGMAN.

BREAST DRILL SUPPORT.

APPLICATION FILED APR. 2. 1915.

Patented Dec. 14, 1915.

2 SHEETS-SHEET 2.

Ill llllllH Zzijrfimesses: 157126717502 Ike/ado 7"@/ Bar" m/am/ ITHEODORE BERGMAN, OF CHICAGO, ILLINOIS.

BREAST-DRILL SUPPORT.

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Specificationof Letters rat-em.

Patented nee. la, iaia.

Application filed April 2, 1915. Serial No. 18 827.

To all whom it may concern" v Be it known that I, Tnnooonn Bnuoiran, acitizen of the United States, and a resident of the city of Chicago,county of Cook, and State of Illinois, have invented certain new anduseful Improvements in Breast- Drill Supports, of which the following isa specification.

My invention relates to mechanism through the medium of which a simplebreast-drill may be employed as an upright standing drill, in order toadapt the drill for'use in connection with many classes of work wherethe ordinary breast-drill cannot suitably be used.

T he object of my invention is the production of a device of thecharacter mentioned which will be of simple construction and eilicientin use.

Other objects will appear hereinafter.

The invention consists in the combinations and ar' anirements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings fo m ng a part of this specification, and in which,

F i gure 1 is a front elevation of a breast drill supporting mechanismembodying my invention, a breast-drill being shown in connectiontherewith, Fig. 2, asectional detail top plan view of the upper crosspiece of the device illustrating the construction of the guide attachedthereto, Fig. 3, a detail sec tion taken on line a--00 of Fig. 1, Fig.1, a partial sectional side elevation of the construction shown in Fig.1, and Fig. 5, a plan view of the base plate of the device with theguide bars shown in section.

T he preferred form of construction as illustrated in the drawingscomprises a plate 1 provided with suitable openings for the reception ofscrews 2 whereby said plate may be rigidly fastened to a bench or tabletop or other suitable supporting structure. Rigidly secured in andarising from the base plate 1 are spaced parallel guide bars 3 which arerigidly connected at their upper ends by a cross piece l.

Slidably mounted upon the guide bars 3 is a yoke 5 which is moved or fedvertically by means of a screw 6 which is threaded in the cross piece 4.The lower end of said screw 6 is in swiveled connection with the yoke 5,the upper end of said screw being provided with a hand wheel wherebysaid screw may be manually rotated. Formed in the front side of the yoke5 midway the ends thereof is a circular socket 8 and formed in therearward side of said yoke coaxial with the socket 8 is a second socket9, the bottoms of said sockets S and 9 being connected by a smalleropening or a pas sage 10.

Arranged upon the upper side of the cross piece l midway the endsthereof is a guide member 11 substantialy U-shaped in form. One end ofsaid guide member is pivotally secured by means of a screw 12 to anenlargement 13 formed upon the member 4 to accommodate said guidemember. At the opposite end of said guide member is provided a dependinglip 14: adapted for engagement against the adjacent edge of the portion13 inorder to lock the guide member in operative or closed position.With this arrangement in order to unlock said guide member so as topermit of swinging thereof to a position in which entrance may be gainedto the entrance slot 15, it is first necessary to sufficiently loosenthe screw 12 to permit of the lip 14 being moved vertically fromengagement with the post 18, "When this has been done, the guide membermay be swung upon the sc ew 12 as a pivot to the position shown in Fig.2.

The breast-drill which is used in coniunction with the supporting devicecomprises a drill stock or frame 16, an upwardly extending bar 17 forthe support of the breast plate 18. a downwardly extending chuck 19 forthe drill 20. meshing bevel gears 21 for driving the drill spindle and ahandle 22 for manually rotating the gears 21. At the rearward side ofthe frame 16 is provided a stud 23 to which is fastened a handle 24,said handle having a threaded stem 25 at its inner end which engageswith a threaded recess 26 formed in the stud 23.

In using the breast-drill in connection with the device the handle 24 isremoved. This having been done the stud 23 is inserted in the socket 8of the yoke 5, whereupon the inner end' of handle 24 is inserted intothe socket 9, the stem 25 being passed through the opening 10 andreengaged with the recess 26. Thus the handle 24.- will serve as a meansof rigidly locking the frame of the breast-drill to the yoke 5. At thesame time the bar 17 of the breast-drill is engaged with the guidemember 11 which will serve to securely hold the same in vertical posiwith a slot 27 in order to adapt the device to accommodate abreast-drill having a bar 17 of ribbed formation as Will be readilyunderstood.

While I have illustrated and described the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification Without departing from the spirit of theinvention as defined by the claims. I, therefore. do not wishto belimited to the precise details of construction set forth, but desire toavail myself of. such variations and modifications as come Within thescope of the appended claims.

Having described my invention what I claim as new and desire to secureby Letters Patent is:

1; The combination with a breast-drill. of a base plate; a pair ofspaced parallel guide bars rigidly secured to and arising from saidplate; a cross piece rigidlyconnecting the upper ends of said guidebars; a yoke slidably mounted on said guide bars; means for fasteningthe breast-drill to said yoke; a substantialy U-shaped guide member forthe upper end portion of the breast-drill pivotally mounted on saidcross piece; a depending lug on the free end of said guide member forengagement with said cross piece to lock said free end of said guidemember in operative position; and means for moving said yoke on saidguide bars; substantially as described.

2. The combination with a breast-drill, of a base plate; a pair ofspaced parallel guide bars rigidly secured to and arising from saidplate; a cross piece rigidly connecting the upper ends of said guidebars; a yoke slidably mounted on said guide bars; means for fasteningthe breast-drill to said yoke; a substantially U-shapcd guide member forthe upper end portion of the breast-drill mounted on said cross piece; ascrew for pivotally securing one end of said guide member to said crosspiece; a stop for locking the other end of said guide member inoperative position; and means for moving said yoke on said guide bars,substantially as described. In testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses.

THEODORE BERGMAN. WVitnesses:

ARTHUR A. OLsov, HELEN F. LILLIS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

- Washington, D. G.

